PREPARING THE INITIAL NEUTRON PHYSICS DATA FOR JUSTIFICATION OF FUEL UNDER POWER VARIATION MODES. STATEMENT OF the PROBLEM AND EXPERIENCE IN PRACTICAL SOLUTION

K.Yu. Kurakin, B.G. Kozak, A.K. Gorokhov, Russia, OKB "GIDROPRESS"

18th Symposium of AER on VVER Reactor Physics and Reactor Safety (2008, Eger, Hungary)
Core operation, Experiments and Code Validation

Abstract

Reactor power variation causes additional thermo-mechanical loads on fuel rod clads increasing with increase in a number of loading cycles and fuel burn-up fraction. Power distribution resulted from power variation and motion of control rods is of rather complicated character that can be correctly considered only in detailed (pin-by-pin) presentation of the core neutron physics characteristics.

Presentation / full paper